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Abstract #3192

Reduced specific absorption rate (SAR) and scan time using variable density Magnetization Transfer (vdMT) for 7T

Se-Hong Oh 1 , Wanyong Shin 1 , Jongho Lee 2 , and Mark J Lowe 1

1 Imaging Institute, Cleveland Clinic Foundation, Cleveland, OH, United States, 2 Department of Electrical and Computer Engineering, Seoul National University, Seoul, Korea

Due to much higher SAR of tissue and much longer acquisition time, in vivo studies using MT at UHF MRI has not been feasible in an acceptable scan time. In this work, we described a novel MT acquisition scheme within a clinically reasonable time (<6 min). Our proposed new approach uses a combination of higher density of MT pulses applied to the center k-space lines and sparsely applied MT pulses in the outer k-space lines. With new proposed MT acquisition scheme, the scan time is reduced considerably while maintaining similar MTR contrast comparable to conventional MT.

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